Giuseppe Bilotta<p>This thread about writing games vs writing game engines <<a href="https://peoplemaking.games/@eniko/114137694102639793" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">peoplemaking.games/@eniko/1141</span><span class="invisible">37694102639793</span></a>> by <span class="h-card" translate="no"><a href="https://peoplemaking.games/@eniko" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>eniko</span></a></span>, and the comments within by many other people, is a fascinating read for me, particularly in relation to the similarities and the differences with our experience in the development of what is, for all intents and purposes, a <a href="https://fediscience.org/tags/CFD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>CFD</span></a> engine, but also many of the test cases it has been used for.</p><p>For many <a href="https://fediscience.org/tags/ComputationalFluidDynamics" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>ComputationalFluidDynamics</span></a> methods, it's actually pretty simple to write an implementation for a “trivial” test case (straight walls, right angles if any at all, periodic boundary conditions, etc). We did that for example in a couple of hours during the MODCLIM 2016 training school <a href="https://modclim.ulpgc.es/index.php/events/8-modclim-events" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">modclim.ulpgc.es/index.php/eve</span><span class="invisible">nts/8-modclim-events</span></a></p><p>Things become quickly non-trivial as soon as you start needing</p><p>1. non-trivial geometries</p><p>and</p><p>2. more complex physics and/or more sophisticated methods.</p><p>1/</p>
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#ComputationalFluidDynamics
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Nicole Sharp<p><strong>How CO2 Gets Into the Ocean</strong></p> <p><a class="" href="https://fyfluiddynamics.com/wp-content/uploads/bwaveCO2a.png" rel="nofollow noopener noreferrer" target="_blank"></a></p> <p><a class="" href="https://fyfluiddynamics.com/wp-content/uploads/bwaveCO2b.png" rel="nofollow noopener noreferrer" target="_blank"></a></p> <p><a class="" href="https://fyfluiddynamics.com/wp-content/uploads/bwaveCO2c.png" rel="nofollow noopener noreferrer" target="_blank"></a></p> <p></p> <p>Our oceans absorb large amounts of atmospheric carbon dioxide. Liquid water is quite good at dissolving carbon dioxide gas, which is why we have seltzer, beer, sodas, and other carbonated drinks. The larger the surface area between the atmosphere and the ocean, the more quickly carbon dioxide gets dissolved. So breaking waves — which trap lots of bubbles — are a major factor in this carbon exchange.</p><p>This video shows off numerical simulations exploring how breaking waves and bubbly turbulence affect carbon getting into the ocean. The visualizations are gorgeous, and you can follow the problem from the large-scale (breaking waves) all the way down to the smallest scales (bubbles coalescing). (Video and image credit: <a href="https://doi.org/10.1103/APS.DFD.2024.GFM.V2694489" rel="nofollow noopener noreferrer" target="_blank">S. Pirozzoli et al.</a>)</p><p><a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/2024gfm/" target="_blank">#2024gfm</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/breaking-wave/" target="_blank">#breakingWave</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/bubbles/" target="_blank">#bubbles</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/carbon-cycle/" target="_blank">#carbonCycle</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/carbon-dioxide/" target="_blank">#carbonDioxide</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/cfd/" target="_blank">#CFD</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/climate-change/" target="_blank">#climateChange</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/computational-fluid-dynamics/" target="_blank">#computationalFluidDynamics</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/dissolution/" target="_blank">#dissolution</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/flow-visualization/" target="_blank">#flowVisualization</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/fluid-dynamics/" target="_blank">#fluidDynamics</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/numerical-simulation/" target="_blank">#numericalSimulation</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/physics/" target="_blank">#physics</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/science/" target="_blank">#science</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/turbulence/" target="_blank">#turbulence</a></p>
GPUSPH<p>Hello all! This will be the official <a href="https://floss.social/tags/GPUSPH" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>GPUSPH</span></a> account on the Fediverse going forward. What is GPUSPH, you ask? It's a software for <a href="https://floss.social/tags/ComputationalFluidDynamics" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>ComputationalFluidDynamics</span></a> using the <a href="https://floss.social/tags/SmoothedParticleHydrodynamics" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SmoothedParticleHydrodynamics</span></a> method, accelerated by running entirely* on GPU. In fact, it was the first to do so, leveraging the new GPGPU capabilities offered by NVIDIA CUDA.</p><p>(These days we have wider hardware support, but for a long time CUDA was all we supported.)</p><p><a href="https://floss.social/tags/introduction" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>introduction</span></a> <a href="https://floss.social/tags/newHere" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>newHere</span></a> <a href="https://floss.social/tags/CFD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>CFD</span></a> <a href="https://floss.social/tags/HPC" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>HPC</span></a></p><p>*conditions apply</p>
Nicole Sharp<p>In recent years, Arctic permafrost has thawed at a surprisingly fast pace. Much of that is, of course, due to the rapid warming caused by climate change. But some of that phenomenon lives underground, where water’s unusual properties cause convection in gaps between rocks, sediment, and soil. </p><p>Water is densest not as ice but as water. This is why ice cubes float in your glass. Water’s densest form is actually a liquid at 4 degrees Celsius. For water-logged Arctic soils, this means that the densest layer is not at the frozen depth but at a higher, shallower depth. This places a dense liquid-infused layer over a lighter one, a recipe for unstable convection.</p>Illustration of underground convection and permafrost thaw. On the left: temperature and density of the water in Arctic soil varies with depth. The temperature gets colder the deeper you go, but because water is densest at 4 degrees Celsius, the density is greatest at a shallower depth than the freezing interface. As a result of this unstable configuration (dense water over less dense water), convection can occur (right).<p>In a recent numerical simulation, <a href="https://doi.org/10.1103/PhysRevFluids.9.L081501" rel="nofollow noopener noreferrer" target="_blank">researchers found</a> that this underground convection caused permafrost to thaw much more quickly than it would due to heat conduction alone. In fact, the effects appeared in as little as one month, so in a single summer, this convection could have a big effect on the thaw depth. (Image credit: top – <a href="https://pixabay.com/photos/polar-arctic-cold-ice-nature-3648378/" rel="nofollow noopener noreferrer" target="_blank">Florence D.</a>, figure – <a href="https://doi.org/10.1103/PhysRevFluids.9.L081501" rel="nofollow noopener noreferrer" target="_blank">M. Magnani et al.</a>; research credit: <a href="https://doi.org/10.1103/PhysRevFluids.9.L081501" rel="nofollow noopener noreferrer" target="_blank">M. Magnani et al.</a>)</p><p><a href="https://fyfluiddynamics.com/2024/10/underground-convection-thaws-permafrost-faster/" class="" rel="nofollow noopener noreferrer" target="_blank">https://fyfluiddynamics.com/2024/10/underground-convection-thaws-permafrost-faster/</a></p><p><a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/cfd/" target="_blank">#CFD</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/computational-fluid-dynamics/" target="_blank">#computationalFluidDynamics</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/convection/" target="_blank">#convection</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/fluid-dynamics/" target="_blank">#fluidDynamics</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/geophysics/" target="_blank">#geophysics</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/instability/" target="_blank">#instability</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/numerical-simulation/" target="_blank">#numericalSimulation</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/permafrost/" target="_blank">#permafrost</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/physics/" target="_blank">#physics</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/planetary-science/" target="_blank">#planetaryScience</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/science/" target="_blank">#science</a></p>
Nicole Sharp<p>The Gulf Stream current carries warm, salty water from the Gulf of Mexico northeastward. In the North Atlantic, this water cools and sinks and drifts southwestward, emerging centuries later in the Southern Ocean. Known as the <a href="https://en.wikipedia.org/wiki/Atlantic_meridional_overturning_circulation" rel="nofollow noopener noreferrer" target="_blank">Atlantic Meridional Overturning Circulation</a> (AMOC), this circulation is critical, among other things, to Europe’s temperate climate. Since 1995, scientists have been warning that human-driven climate change is weakening the AMOC and may cause it to shut down entirely — which would have catastrophic consequences for our society.</p> Comparison of ocean current speeds in the low-resolution (left) and high-resolution (right) simulations. <p>A <a href="https://doi.org/10.1103/PhysRevLett.133.034201" rel="nofollow noopener noreferrer" target="_blank">recent study</a> re-examined the AMOC using both low- and high-resolution numerical simulations, combined with direct observations. Both simulations covered 1950 – 2100 and found the AMOC’s strength has declined since 1950. But the high-resolution simulation found significant regional variations in the AMOC’s behavior. Some regions saw localized strengthening, while other areas showed abrupt collapse. These sensitive shifts underscore the importance of driving toward higher resolutions in our next-generation climate models, if we want to better understand — and perhaps predict — what lies ahead as our climate changes. (Image credit: illustration – <a href="https://artsci.tamu.edu/news/2022/10/understanding-the-amoc-texas-aandm-experts-explain-slowing-currents.html" rel="nofollow noopener noreferrer" target="_blank">Atlantic Oceanographic and Meteorological Laboratory</a>, simulations – <a href="https://doi.org/10.1103/PhysRevLett.133.034201" rel="nofollow noopener noreferrer" target="_blank">R. Gou et al.</a>; research credit: <a href="https://doi.org/10.1103/PhysRevLett.133.034201" rel="nofollow noopener noreferrer" target="_blank">R. Gou et al.</a>; via <a href="https://physics.aps.org/articles/v17/115?utm_campaign=weekly&utm_medium=email&utm_source=emailalert" rel="nofollow noopener noreferrer" target="_blank">APS Physics</a>)</p><p><a href="https://fyfluiddynamics.com/2024/08/resolution-effects-on-ocean-circulation/" class="" rel="nofollow noopener noreferrer" target="_blank">https://fyfluiddynamics.com/2024/08/resolution-effects-on-ocean-circulation/</a></p><p><a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/cfd/" target="_blank">#CFD</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/circulation/" target="_blank">#circulation</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/climate-change/" target="_blank">#climateChange</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/computational-fluid-dynamics/" target="_blank">#computationalFluidDynamics</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/flow-visualization/" target="_blank">#flowVisualization</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/fluid-dynamics/" target="_blank">#fluidDynamics</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/numerical-simulation/" target="_blank">#numericalSimulation</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/ocean-currents/" target="_blank">#oceanCurrents</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/oceanography/" target="_blank">#oceanography</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/physics/" target="_blank">#physics</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/science/" target="_blank">#science</a></p>
Nicole Sharp<p>Growing up in northwest Arkansas, I spent my share of summer nights sheltering from tornadoes. Central North America — colloquially known as <a href="https://en.wikipedia.org/wiki/Tornado_Alley" rel="nofollow noopener noreferrer" target="_blank">Tornado Alley</a> — is especially prone to violent thunderstorms and accompanying tornadoes. That’s due, in part, to two geographical features: the Rocky Mountains and the Gulf of Mexico. Trade winds hitting the eastern slope of the Rockies get turned northward, imparting a counterclockwise vorticity. At the same time, warm moist air carried from the Gulf feeds into the atmosphere, creating perfect conditions for powerful thunderstorms. By this logic, though, South America should see lots of tornadoes, too, courtesy of the Andes Mountains and the moist environs of the Amazon Basin. To understand why South America doesn’t have a Tornado Alley, researchers used global weather models to <a href="https://doi.org/10.1073/pnas.2315425121" rel="nofollow noopener noreferrer" target="_blank">investigate alternate North and South Americas</a>. </p><p>They found that smoothness is a key ingredient for the upstream, moisture-generating region. Compared to the Amazon, the Gulf of Mexico is incredibly flat. With a flat Gulf, tornadoes abounded in North America, but their numbers dropped once that area was roughened to mimic the Amazon. The opposite held true, too: a smoothed-out Amazon Basin resulted in more simulated South American tornadoes.</p><p>For those in Tornado Alley, the results don’t offer much hope for mitigating our summer storms — we can’t exactly roughen the ocean. But the study does sound a word for warning for South America; the smoother the Amazon region becomes — due to mass deforestation — the more likely tornadoes become in parts of South America. (Image credit: <a href="https://unsplash.com/photos/a-large-tornado-is-coming-out-of-the-sky-HiSS1w9r4_I" rel="nofollow noopener noreferrer" target="_blank">G. Johnson</a>; research credit: <a href="https://doi.org/10.1073/pnas.2315425121" rel="nofollow noopener noreferrer" target="_blank">F. Li et al.</a>; via <a href="https://physicsworld.com/a/why-north-america-has-a-tornado-alley-and-south-america-doesnt/?utm_campaign=14290-58586&utm_content=Title%3A%20Why%20North%20America%20has%20a%20%E2%80%98tornado%20alley%E2%80%99%20and%20South%20America%20doesn%E2%80%99t%20-%20explore%20more&utm_term=&utm_medium=email&utm_source=iop" rel="nofollow noopener noreferrer" target="_blank">Physics World</a>)</p><p><a href="https://fyfluiddynamics.com/2024/08/why-tornado-alley-is-north-american/" class="" rel="nofollow noopener noreferrer" target="_blank">https://fyfluiddynamics.com/2024/08/why-tornado-alley-is-north-american/</a></p><p><a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/atmospheric-science/" target="_blank">#atmosphericScience</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/cfd/" target="_blank">#CFD</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/computational-fluid-dynamics/" target="_blank">#computationalFluidDynamics</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/fluid-dynamics/" target="_blank">#fluidDynamics</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/meteorology/" target="_blank">#meteorology</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/physics/" target="_blank">#physics</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/science/" target="_blank">#science</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/surface-roughness/" target="_blank">#surfaceRoughness</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/thunderstorm/" target="_blank">#thunderstorm</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/tornado/" target="_blank">#tornado</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/vorticity/" target="_blank">#vorticity</a></p>
Nicole Sharp<p>Venus flower basket sponges have an elaborate, vase-like skeleton pocked with holes that allow water to pass through the organism. A <a href="https://doi.org/10.1103/PhysRevLett.132.208402" rel="nofollow noopener noreferrer" target="_blank">recent numerical study</a> looked at how the sponge’s shape deflects incoming (horizontal) ocean currents into a vertical flow the sponge can use to filter out food.</p><p>The sponges’ structure is porous and lined with helical structures. In their simulation, researchers reproduced a version of this structure (shown below) that used none of the real sponge’s active pumping mechanisms. The digital sponge was, instead, purely passive. Nevertheless, the simulation showed that, by their skeletal structure alone, sponges could redirect a significant fraction of incoming flow toward its filtering surfaces. Interestingly, the highest deflection fraction occurred at relatively low flow speeds, showing that the sponges are set up so that their structure is especially helpful for scavenging nutrients from nearly-still waters.</p><p>In the real world, these sponges use a combination of passive filtering and active pumping to capture their food, but this study shows that the sponge’s clever structure helps it save energy, especially in tough flow conditions. (Image credit: sponges – NOAA, simulation – <a href="https://doi.org/10.1103/PhysRevLett.132.208402" rel="nofollow noopener noreferrer" target="_blank">G. Falcucci et al.</a>; research credit: <a href="https://doi.org/10.1103/PhysRevLett.132.208402" rel="nofollow noopener noreferrer" target="_blank">G. Falcucci et al.</a>; via <a href="https://physics.aps.org/articles/v17/81" rel="nofollow noopener noreferrer" target="_blank">APS Physics</a>)</p> A detail from a numerical simulation shows streamlines around and inside a model sponge. <p><a href="https://fyfluiddynamics.com/2024/06/venus-flower-basket-sponges/" class="" rel="nofollow noopener noreferrer" target="_blank">https://fyfluiddynamics.com/2024/06/venus-flower-basket-sponges/</a></p><p><a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/biology/" target="_blank">#biology</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/cfd/" target="_blank">#CFD</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/computational-fluid-dynamics/" target="_blank">#computationalFluidDynamics</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/filter-feeding/" target="_blank">#filterFeeding</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/fluid-dynamics/" target="_blank">#fluidDynamics</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/numerical-simulation/" target="_blank">#numericalSimulation</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/physics/" target="_blank">#physics</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/porous-flow/" target="_blank">#porousFlow</a> <a rel="nofollow noopener noreferrer" class="hashtag u-tag u-category" href="https://fyfluiddynamics.com/tagged/science/" target="_blank">#science</a></p>
Giuseppe Bilotta<p>I also want to explore more <a href="https://fediscience.org/tags/GeometricAlgebra" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>GeometricAlgebra</span></a> applied to <a href="https://fediscience.org/tags/physics" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>physics</span></a> and <a href="https://fediscience.org/tags/ComputationalPhysics" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>ComputationalPhysics</span></a> (not necessarily for <a href="https://fediscience.org/tags/FluidDynamics" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>FluidDynamics</span></a> and <a href="https://fediscience.org/tags/CFD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>CFD</span></a>, but that would be preferable as it's obviously our primary topic of relevance). I can't seem to find anything that combines <a href="https://fediscience.org/tags/SPH" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SPH</span></a> and GA, so it might even lead to some new interesting venues to explore.</p><p>3/n</p><p><a href="https://fediscience.org/tags/ComputationalFluidDynamics" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>ComputationalFluidDynamics</span></a> <a href="https://fediscience.org/tags/SmoothedParticleHydrodynamics" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SmoothedParticleHydrodynamics</span></a></p>
Giuseppe Bilotta<p>Does anybody know of <a href="https://fediscience.org/tags/Lemmy" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Lemmy</span></a> communities/magazines centered around any of these topics:</p><p><a href="https://fediscience.org/tags/CFD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>CFD</span></a> aka <a href="https://fediscience.org/tags/ComputationalFluidDynamics" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>ComputationalFluidDynamics</span></a></p><p><a href="https://fediscience.org/tags/SPH" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SPH</span></a> aka <a href="https://fediscience.org/tags/SmoothedParticleHydrodynamics" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SmoothedParticleHydrodynamics</span></a> </p><p>The closest I can find is <span class="h-card"><a href="https://discuss.tchncs.de/c/fluidmechanics" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>fluidmechanics</span></a></span></p>
Fenjan🦖<p>date: 2023-02-11 22:21:21<br>by: PhdScanner</p><p>✅ Passionate about <a href="https://sigmoid.social/tags/airquality" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>airquality</span></a> and <a href="https://sigmoid.social/tags/health" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>health</span></a> ?</p><p>✅ 3️⃣ year fully funded <a href="https://sigmoid.social/tags/phdposition" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>phdposition</span></a> on designing <a href="https://sigmoid.social/tags/sustainable" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>sustainable</span></a> methods for airborne particle spread @KTHuniversity</p><p>🗓️Deadline: 09 Mar '23</p><p>Details 👇</p><p><a href="https://www.kth.se/en/om/work-at-kth/lediga-jobb/what:job/jobID:591455/type:job/where:4/apply:1" rel="nofollow noopener noreferrer" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">kth.se/en/om/work-at-kth/ledig</span><span class="invisible">a-jobb/what:job/jobID:591455/type:job/where:4/apply:1</span></a></p><p><a href="https://sigmoid.social/tags/computationalfluiddynamics" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>computationalfluiddynamics</span></a> <a href="https://sigmoid.social/tags/Python" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Python</span></a> <a href="https://sigmoid.social/tags/matlab" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>matlab</span></a> <a href="https://sigmoid.social/tags/cfd" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>cfd</span></a> <a href="https://sigmoid.social/tags/sweden" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>sweden</span></a> </p><p>🐦🔗: <a href="https://twitter.com/twitter/statuses/1624534077968637956" rel="nofollow noopener noreferrer" target="_blank"><span class="invisible">https://</span><span class="ellipsis">twitter.com/twitter/statuses/1</span><span class="invisible">624534077968637956</span></a><br><a href="https://sigmoid.social/tags/PhdPosition" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>PhdPosition</span></a></p>
Dr Lutz Böhm<p>Wow, this is pretty cool, history of <a href="https://mastodon.social/tags/CFD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>CFD</span></a> <a href="https://mastodon.social/tags/ComputationalFluidDynamics" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>ComputationalFluidDynamics</span></a>.</p><p><a href="https://youtu.be/KWtX_E51gtU" rel="nofollow noopener noreferrer" target="_blank"><span class="invisible">https://</span><span class="">youtu.be/KWtX_E51gtU</span><span class="invisible"></span></a></p>
Giuseppe Bilotta<p>Let's talk about <a href="https://fediscience.org/tags/SmoothedParticleHydrodynamics" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SmoothedParticleHydrodynamics</span></a> (<a href="https://fediscience.org/tags/SPH" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SPH</span></a> for short, even though you'll see <a href="https://fediscience.org/tags/sph_" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>sph_</span></a> used on other sites, because <a href="https://fediscience.org/tags/SPH" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SPH</span></a> also has a very common, very not-safe-for-work meaning …).</p><p>Why should we talk about it? Because it's relatively less known than other numerical methods, possibly undeservingly so, and because I love it.</p><p>So what is it? SPH is a Lagrangian meshless numerical method primarily used for <a href="https://fediscience.org/tags/ComputationalFluidDynamics" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>ComputationalFluidDynamics</span></a> (and more recently also <a href="https://fediscience.org/tags/ComputationalMechanics" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>ComputationalMechanics</span></a>).</p>
Giuseppe Bilotta<p><a href="https://fediscience.org/tags/introduction" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>introduction</span></a></p><p>I work at the Osservatorio Etneo, Catania section of the Italian National Institute for Geophysics and Volcanology <a href="https://fediscience.org/tags/INGV" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>INGV</span></a>.<br>Mathematician by formation, scientific software developer by necessity, I work on <a href="https://fediscience.org/tags/lava" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>lava</span></a> flow <a href="https://fediscience.org/tags/simulation" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>simulation</span></a>, <a href="https://fediscience.org/tags/hazard" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>hazard</span></a> assessment, <a href="https://fediscience.org/tags/risk" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>risk</span></a> mitigation.<br>Much of my work revolves around <a href="https://fediscience.org/tags/ComputationalFluidDynamics" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>ComputationalFluidDynamics</span></a> (<a href="https://fediscience.org/tags/CFD" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>CFD</span></a>), w/ a preference for <a href="https://fediscience.org/tags/SmoothedParticleHydrodynamics" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SmoothedParticleHydrodynamics</span></a> (<a href="https://fediscience.org/tags/SPH" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SPH</span></a>).<br>I should probably mention my interest in <a href="https://fediscience.org/tags/HPC" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>HPC</span></a> and <a href="https://fediscience.org/tags/GPGPU" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>GPGPU</span></a>, but I ran out of characters …</p>
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